Added permissions for reference upload

[skip ci]

Author: Stefterv

.github/workflows/release-gradle.yml

@@ -24,6 +24,8 @@ jobs:
   reference:
     name: Publish Processing Reference to release
     runs-on: ubuntu-latest
+    permissions:
+      contents: write
     needs: version
     steps:
     - name: Checkout Website Repository
@@ -170,4 +172,4 @@ jobs:
         if: runner.os == 'Linux'
         run: snapcraft upload --release=beta app/build/compose/binaries/main/${{ matrix.binary }}.${{ matrix.extension }}
         env:
-          SNAPCRAFT_STORE_CREDENTIALS: ${{ secrets.PROCESSING_SNAPCRAFT_TOKEN }}
+          SNAPCRAFT_STORE_CREDENTIALS: ${{ secrets.PROCESSING_SNAPCRAFT_TOKEN }}